A particle that contains 9 protons, 10 neutrons and 10 electrons is?

A. positive ion
B. neutral atom of a metal
C. neutral atom of a non-metal
D. negative ion

Correct Answer:

Option D – negative ion

Explanation

protons = 9

neutrons = 10

electrons = 10

Electronic configuration = 2, 8

Ground state Electronic configuration=2, 7

It means that the atom has gained an electron thereby making it have a negative ion.

When an atom donates an electron, it becomes positively charged.

When an atom accepts an electron, it becomes negatively charged